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15th December 2001, 21:21 | #1 | Link |
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Join Date: Dec 2001
Posts: 66
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GordianKnot/Nandub question
Hi
I'm new to the GKnot/Avisynth/Nandub method but so far everything is fine, though I've got some questions. The movie I'd like to encode: JamesBond, 2h, 2.4:1 "real" AspectRatio, onto 2 CD's, projected bitrate 1400, input resolution: 720x576 (16:9) First: I can't get this Bits/(Pixel*Frame)-Value lower than ~0.27 otherwhise I'd have to set a higher output resolution than 720 (so far I get 0.276 with 720x288 fully cropped) and I think this ain't good (GKnot shows a red flag). Thus, the 5% CompressionCheck with Nandub gives a value of 73%, although Doom9 recommends it to be between 60 & 70%. Am I more or less in tolerance, should I increase the resolution or have I made some mistake ? Second: Is it possible to manually set the keyframe-compression in the SBC-settings (cause set to 2-3 it boosts quality, which even I can understand), when using this combination of GKnot/Nandub (or DO I even have to set all this and other settings of Nandub manually ?). It's nowhere mentioned in the "old/advanced guide" of GKnot/Nandub, although I consider it to be important. Or could this screw up all the projected filesize/compression ? Thanks a lot for every hint Yes, my English ain't good, and you may call me a newbie ripper; I don't care. |
16th December 2001, 15:35 | #2 | Link |
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Join Date: Oct 2001
Posts: 240
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No you don't have to set higher resolution than 720x288.
Maybe crop a bit from the sides so 704x288 will be ok. If i was in your place i would use something like 640x320, i know it's 2:1 aspect ratio but 2.35:1 or 2.4:1 looks terrible in my opinion. Almost 2/3 of the screen are black bars. If you choose smaller frameSize than calculated from the compressibility test, is better than using bigger. I agree with the manual settings in Nandub. I also set the settings in Nandub accordingly to each movie and i use Gnot to create the avs file, do the compressibilty test and the resizing. And NO it won't screw up the fileSize predictability Last edited by philippas; 16th December 2001 at 15:39. |
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